Mark R Alejandro, RN

Primary specialty

Registered NurseTaxonomy code 163W00000X

License

95356222 Issued in CA

Practice address

15200 Foothill Blvd
Castro Valley, CA 94578-1013

Phone

(510) 352-9690

NPI assigned

Jul 8, 2026

Last updated

Jul 8, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1783468800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783468800000",
    "number": "1912825688",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "764 PORTOLA WAY UNIT 102",
            "city": "NAPA",
            "state": "CA",
            "postal_code": "945593041"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "15200 FOOTHILL BLVD",
            "city": "CASTRO VALLEY",
            "state": "CA",
            "postal_code": "945781013",
            "telephone_number": "510-352-9690"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALEJANDRO",
        "first_name": "MARK",
        "middle_name": "R",
        "credential": "RN",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2026-07-08",
        "last_updated": "2026-07-08",
        "certification_date": "2026-07-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "CA",
            "license": "95356222",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Registered Nurse in Castro Valley, CA
• Providers in Castro Valley, CA by specialty
• Registered Nurse in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.